λÓÚÓÎÀÖÔ°µÄĦÌìÂÖ£¬¸ß¶ÈΪ108m£¬Ö±¾¶ÊÇ98m£®Ò»ÖÊÁ¿Îª50kgµÄÓοͳË×ø¸ÃĦÌìÂÖ×öÔÈËÙÔ²ÖÜÔ˶¯ÐýתһȦÐè25min£®Èç¹ûÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄ£¨È¡g=10m/s2£©£¨¡¡¡¡£©
·ÖÎö£ºÖØÁ¦ÊÆÄܵÈÓÚmgh£¬ÆäÖÐhÖ¸µ½ÁãÊÆÄÜÃæµÄ¸ß¶È£¬½ÇËٶȦØ=
2¦Ð
T
½â´ð£º½â£ºÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄÖØÁ¦ÊÆÄÜΪ£ºEP=mgh=5.4¡Á104J
´ËʱµÄ½ÇËÙ¶ÈΪ£º¦Ø=
2¦Ð
T
=
2¦Ð
25¡Á60
=4.2¡Á10-3rad/s
¹ÊÑ¡A
µãÆÀ£º±¾ÌâÖ÷Òª¿¼²éÁËÖØÁ¦ÊÆÄܵıí´ïʽÒÔ¼°½ÇËٶȵÄÓëÖÜÆڵĹØϵ£¬ÄѶȲ»´ó£¬ÊôÓÚ»ù´¡Ì⣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2010ÄêºÓ±±Ê¡¸ßÈýÉÏѧÆÚµÚ¶þ´ÎÔ¿¼ÎïÀíÊÔÌâ ÌâÐÍ£ºÑ¡ÔñÌâ

λÓÚÓÎÀÖÔ°µÄĦÌìÂÖ£¬¸ß¶ÈΪ108m£¬Ö±¾¶ÊÇ98m¡£Ò»ÖÊÁ¿Îª50kgµÄÓοͳË×ø¸ÃĦÌìÂÖ×öÔÈËÙÔ²ÖÜÔ˶¯ÐýתһȦÐè25min¡£Èç¹ûÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄ£¨È¡g=10m/s2£©                                             £¨    £©

       A£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

       B£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       C£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       D£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2010-2011ѧÄêºÓ±±Ê¡Ê¯¼ÒׯÊÐÕý¶¨ÖÐѧ¸ßÈý£¨ÉÏ£©µÚ¶þ´ÎÔ¿¼ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÑ¡ÔñÌâ

λÓÚÓÎÀÖÔ°µÄĦÌìÂÖ£¬¸ß¶ÈΪ108m£¬Ö±¾¶ÊÇ98m£®Ò»ÖÊÁ¿Îª50kgµÄÓοͳË×ø¸ÃĦÌìÂÖ×öÔÈËÙÔ²ÖÜÔ˶¯ÐýתһȦÐè25min£®Èç¹ûÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄ£¨È¡g=10m/s2£©£¨ £©
A£®ÖØÁ¦ÊÆÄÜΪ5.4×104J£¬½ÇËÙ¶ÈΪ4.2×10-3rad/s
B£®ÖØÁ¦ÊÆÄÜΪ4.9×104J£¬½ÇËÙ¶ÈΪ0.2rad/s
C£®ÖØÁ¦ÊÆÄÜΪ5.4×104J£¬½ÇËÙ¶ÈΪ0.2rad/s
D£®ÖØÁ¦ÊÆÄÜΪ4.9×104J£¬½ÇËÙ¶ÈΪ4.2×10-3rad/s

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

λÓÚÓÎÀÖÔ°µÄĦÌìÂÖ£¬¸ß¶ÈΪ108m£¬Ö±¾¶ÊÇ98m¡£Ò»ÖÊÁ¿Îª50kgµÄÓοͳË×ø¸ÃĦÌìÂÖ×öÔÈËÙÔ²ÖÜÔ˶¯ÐýתһȦÐè25min¡£Èç¹ûÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄ£¨È¡g=10m/s2£©                      £¨    £©

       A£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

       B£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       C£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       D£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

λÓÚÓÎÀÖÔ°µÄĦÌìÂÖ£¬¸ß¶ÈΪ108m£¬Ö±¾¶ÊÇ98m¡£Ò»ÖÊÁ¿Îª50kgµÄÓοͳË×ø¸ÃĦÌìÂÖ×öÔÈËÙÔ²ÖÜÔ˶¯ÐýתһȦÐè25min¡£Èç¹ûÒÔµØÃæΪÁãÊÆÄÜÃ棬ÔòËûµ½´ï×î¸ß´¦Ê±µÄ£¨È¡g=10m/s2£©                                             £¨    £©

       A£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

       B£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       C£®ÖØÁ¦ÊÆÄÜΪ5.4¡Á104J£¬½ÇËÙ¶ÈΪ0.2rad/s

       D£®ÖØÁ¦ÊÆÄÜΪ4.9¡Á104J£¬½ÇËÙ¶ÈΪ4.2¡Á10-3rad/s

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸